US 12,473,610 B2
Steel sheet for enamel and method of manufacturing the same
Jai-Ik Kim, Pohang-si (KR)
Assigned to POSCO CO., LTD, Pohang-si (KR)
Appl. No. 18/035,157
Filed by POSCO Co., Ltd, Pohang-si (KR)
PCT Filed Nov. 4, 2021, PCT No. PCT/KR2021/015944
§ 371(c)(1), (2) Date May 3, 2023,
PCT Pub. No. WO2022/098132, PCT Pub. Date May 12, 2022.
Claims priority of application No. 10-2020-0147141 (KR), filed on Nov. 5, 2020.
Prior Publication US 2024/0011115 A1, Jan. 11, 2024
Int. Cl. B32B 15/04 (2006.01); B32B 17/06 (2006.01); C21D 1/74 (2006.01); C21D 6/00 (2006.01); C21D 8/02 (2006.01); C21D 9/46 (2006.01); C22C 38/00 (2006.01); C22C 38/02 (2006.01); C22C 38/04 (2006.01); C22C 38/06 (2006.01)
CPC C21D 9/46 (2013.01) [C21D 1/74 (2013.01); C21D 6/005 (2013.01); C21D 6/008 (2013.01); C21D 8/0205 (2013.01); C21D 8/0226 (2013.01); C21D 8/0236 (2013.01); C21D 8/0263 (2013.01); C22C 38/001 (2013.01); C22C 38/002 (2013.01); C22C 38/02 (2013.01); C22C 38/04 (2013.01); C22C 38/06 (2013.01); C21D 2211/003 (2013.01)] 15 Claims
OG exemplary drawing
 
1. An enamel steel sheet comprising: by wt %, 0.01 to 0.05% of C, 0.05 to of Mn, 0.001 to 0.03% of Si, 0.03 to 0.12% of Al, 0.001 to 0.02% of P, 0.001 to 0.02% of S, 0.004% or less (excluding 0%) of N, 0.001 to 0.003% of B, or less (excluding 0%) of O, and the balance of Fe and inevitable impurities, and
an oxide layer in an inside direction from a surface, the oxide layer having a thickness of 0.006 to 0.030 μm.